Automatic drilling machine



Oct. 13, 1942. A, snvloNs y AUTOMATIC DRILLING MACHINE Filed March 15,1940 4 Sheets-Sheet 1 f, ma

Oct. 13, 1942. A. slMONS AUTOMATIC DRILLNG MACHINE Filed Maren 15, 19404 sheets-sheet 2 w @N @w INVENTOR A/wo/v S/MoA/s ATToRNEYmV Oct. 13,1942. A. SIMONS AUTOMATIC lDRLLIKI MACHINE Filed March 15. 1940 4Sheets-Sheet 5 ATTORNEY I Oct. 13, 1942'. A. slMoNs .2,298,979

AUTOMATIC DRILLING MACHIN Filed March 15,. 1940 4 Sheets-Sheet 4llllllllllllllllll mvENToR ,4a/Pan( 6mm/v6' Patented Oct. 13, 1942UNITED STATESPATENT OFFICE AUTOMATIC DRILLING MACHINE Aaron Simons,Bronx. N. Y.

Application March 15, 1940, Serial No. 324,028

19 Claims.

This invention relates to drilling machines or what are better termedautomatic drilling machines, and particularly to machines of this kindadaptable for use in the drilling of diamonds, tungsten carbide or otherhard materials for use as wire drawing dies; and the object of theinvention is to provide a machine of the character described employing aplurality of drill supporting spindles with means for movably supportingworkpieces beneath the spindles to intermittently move the workpiecestoward and from drills supported in the spindles while rotating thedrills at high speed and maintaining the drills in a fixed position; afurther object being to provide means for intermittently rotating thesupports for the spindles and the workpiecesin bringing successivedrilling units into `a grinding and lubricating position with means forgrinding the drills in this position and for dropping a combinationlubricant and abrasive into the workpieces automatically; a furtherobject being to provide means for automatically lowering the workpiecesand their supports when in the grinding position to give free access ofthe grinding wheel to the drill to be ground; la further object being toprovide means for reciprocating the grinding wheel vertically withrespect to the drill in grinding the pointed end thereof, and further tothe adjustment of the support for the grinding wheel to controlangularity of the grinding upon the drill, thereby adapting the machinefor the grinding of all drills utilized in av complete cycle ofoperation of drilling diamonds or other workpieces; a further objectbeing to lprovide means for re-surfacing the grinding wheel intermediatepredetermined.

grinding operations; and with these and other objects in view, as willmore fully hereinafter appear, the invention consists in a machine ofthe class and for the purpose specified, which is simple inconstruction, eilicient in use, and which is constructed as hereinafterdescribed and claimed.

The invention is fully disclosed in the following specification, ofwhich the accompanying drawings form a part, in which the separate partsof my improvement are designated by suitable reference characters ineach of the views, and in which:

Fig. l is a side and sectional view of a machine made according to myinvention.

Fig. 2 'is an enlarged sectional view substantially on the line 2-2 ofFig. 1.

Fig. 3 is a sectional plan view substantially on the line 3-3 of Fig. 1with parts of the structure broken away.

Fig. 4 is a sectional detail view substantially on the line 4-4 of Fig.1.

Fig. 5 is a sectional view substantially on the broken line 5-5 of Fig.4.

Fig. 6 is a face view of a part of the construction as seen in Fig. 4looking in the direction of the arrow 6 6.

Fig. 6A is a detail view looking in the direction of the arrow 6A ofFig. 6.

Fig. 7 is a view looking in the direction of the arrow 1-1 of Fig. 3,with parts of the construction broken away and in section.

Fig. 8 is a view similar to Fig. 7 showing the parts in a differentposition.

Fig. 9 is a'face view of the lower end portion of one of the workpiecesupporting members which I employ.

Fig. 10 is a sectional detail view'substantially on the line Ill-l0 ofFig. 1 on an enlarged scale.

Fig. 11 is a perspective view of a wobble cam detached.

Fig. 12 is a. sectional detail view through a workpiece indicatingdiagrammatcally the ma'nner of drilling a diamond forming part of theworkpiece.

Fig. 13 shows detached views of modified points of drilling needleswhich I employ.

Fig. 14 is an enlarged detail view of a part oi the construction shownin Fig. lof the drawings;

80 and Fig. 15 isan enlarged detail view of a part of the constructionshown in Fig. 1.

For the purpose of describing one use or adaptation of my invention, Iwill refer to its use in the drilling of diamonds to produce what arecommonly known as drawing dies. It will be understood, however, that themachine may be utilized in performing drilling operation in workpiecesof various kinds and classes and especially where it is desirable tosuccessively drill a. workpiece with drilling tools having diierentangles whereby in a successive series of drilling operationslapredetermined tapered hole or socket may be formed in a workpiece, andone having a relatively ne pointed end so as to adapt lthe resultingworkypieces for drawing strands of minute, as well as large, diameters.

In forming drawing dies or tools of the type and kind underconsideration, the entrance angle or taper of the die must beconstructed to suit the different uses to which the tool is adapted.With a machine of the type and kind under consideration, these tapers orentrance angles may be produced to the most accurate degree desirable,

especially through a wide range adjustability, or

whatmay be termed flexibility, of the machine.

One of the distinctive features of the present invention resides insupporting the drills in a stationary or fixed position while rotatingthe drills at high speed in this position. A further feature resides inyieldably moving the workpieces toward and from the drills as well as inraising Adjustably supported on the column is a bracket l I 8 to oneside of which is bolted an electric drive motor I8 with the' shaft ofthe motor arranged vertically. The motor has an adjustable support 2l!in another bracket 2i supported on the column I8. The bracket I8 has anextension 22 upon which is supported the bed or table 28 of the machine.

The shaft of the motor I8 has an extension 24 upon which are arranged avertical drive pulley unit.28 and pulley 28 and three other pulleys 21,-28 and 28. The extension 24 may be supported in any desired mannenand inthe construction shown, brackets 88 and 8| are indicated. The latterbrackets are supported upon the extension I1 of the column I8. Thebracket 8| is inturn supported upon-` a larger bracket 82 in the freeend of which is arranged a drive shaft 88 actuated `engaging the rack.An adjustable coupling link 88 is provided for coupling the shaft 88with the extension 88a thereof. Keyed to the extension 88a is a largedrive gear 40.

On the bed or table 28 is an upstanding spindle 4I. Rotatable onthis'spindle is lthe turret or workpiece supporting table 42. The table42 88 and spaced apart by a spacing sleeve 84. In other words. the shaft88a is free to rotate within the bushing 88 without contributing. anyrotary movement to the shaft 88b.

The shaft 88h extends through the bracket extension 22, note Fig. l0.and is coupled with an enlarged threaded portion 88 which operates in athreaded bushing 88 keyed against rotation in a housing 81 by a screw88, note Fig. l. At this time it is to be understood that in the upwardmovement `of the tools 41 through the rack 85, the screw 88 must belooned to permit the bushing 88 to slide vertically. The housing 81 issupported in.conneetion with the bracket extension 22 bybolts 88. Anadjustment nut 88 is provided on the enlarged threaded extension 88 `tolimit downward movement of the drills in the work-Jwww piece. The screw88 forms a feed screw which feeds the table 48 downwardly in the slowinterhas an upwardly directed sleeve extension 48 upon which thedownwardly directed sleeve extension 44 of a tool supporting table 48 isarranged. The latter carries circumferentially-of the periphery thereof,tool supporting chucks 48 for the needles, drills or tools 41. Theshafts or spindles of the chucks have gears 48 which mesh with the gear48 to provide for a high speed drive of the tools 41. When quietoperation of the machine is desired, it is preferred that fibre gears 48be employed, otherwise any other type of gears can be utilized. In theconstruction shown, twelve chucks 48 are employed, but it will beunderstood that any desired number of tools may be provided.

The tables 42 and' 48 are bolted together by a plurality of bolts 49,note Fig. 3 of the drawings, so that the two tables will operate as aunit'. It will be understood that in the upward movement of the tools 41through the medium of the rack 38, the entire unit will move upwardlycarrying with it the bushing and the bearings disposed in this bushing.

A coupling plate 5I is fixedly secured to a shaft 33h which extendsdownwardly through the spindle 4I. The plate 8| is secured to thebushing 80, whereas the lower end of the shaft 88a is riveted to seat inone of the bearings as at 52, note Fig. 14. The bearings are held inplace by a plate mittent rotary movement thereof, as will be apparent.It will be understood that the table 48 slides on the bolts 48 which actas key pins in keying the tables 42-48 together. It will also beunderstood that there is sufficient ilexure in the belt 88 to compensatefor this movement.

The turret `or table 42 is supported against movement on the spindle 4Iby a plate 8I secured to the-top of the spindle and overlapping thesleeve portion 48. By resting upon a bearing or collar 82 seatingon anenlarged portion of the spindle 4 I, sufficient clearance is providedbetween the plates 8| and 8l to compensate for the automatic downwardfeed of the tools in the workpieces.

The chuck construction 48 is shown in sectional detail in Fig. 2 of thedrawings, and at 48a is indicated a set screw for retaining the tools41-in proper position of adjustment in these chucks. It will beunderstood, however, that any type or kind of chuck will be provided.While plain bearings are disclosed in the present chuck construction, itwill be understood that any other mountings may be provided.

Supported directly beneath each of the chucks 48 in the table 48 areworkpiece supporting memvbers 88 arranged in the table 42. Each of thesemembers comprisea sleeve or bushing 84 in which is disposed a plungersleeve 88. Coupled to the lower end of the plunger sleeve 88 is a rod88.

Secured to the lower protruding end of the sleeve 64 are pins 81 towhich are`attached springs 88 coupled with cotter-pins or the like 88awhich serve to support the sleeve in raised position in the table 42.The protruding end of the sleeve 84 is provided with slots 88 to receivean extending arm 10 on the lower end of the rod 88. Adjustable in thearm 10 is a screw 1I, operating upon the lower end of a rod 12 whichmoves vertically in the table 42.v The rod is keyed against rotationtherein by a pin 18 operating in a slot table 42. The lower end of thepin 88 engages and is actuated by a wobble cam 84 which is supportedupon a variable pulley unit 85. 'I'he unit 85 is rotatable upon thefixed spindle 4I and actuated through the variable pulley 28 and belt28a.

The wobble cam 84 is shown in detail in Fig. 11 of the drawings. Thiscam has two downwardly extending arms 84a supporting fulcrum screws 84hwhich are fixedly supported in the variable pulley 85. Other set screws84e are disposed atright angles to the screws 84h and adjustably engagethe pulley to vary the-inclination of the cam so as to govern theso-called wobble or cam-like action thereof to impart movement to theworkpieces 8| as the cam is rotated through the pulley 85.

Supported on the top of the plunger 65\is a cup-shaped casing 86, noteFig. 2, which is adjustably supported on the plunger. Also supportedwithin 'the plunger is a sleeve 81 in which is slidably mounted a rod 98carrying at its upper end a supporting table 89 for the workpiece 8|. Alight spring 90 is disposed between the table 89 and the casing 86 topermit yieldable movement of the workpiece 8| in a direction away fromthe tool 81 when the workpiece is moved into engagement with the tool;thereby avoidingany possible jamming or destruction to the fine pointsof the tool and compensating for any irregularities which may prevail,and

- definitely eliminating a positive movement of the workpiece intoengagement with the tool. The pin 88 is retained against upward movementby a key pin 9| operating in an elongated aperture 92 in the sleeve 81which also keys the support 89 against rotation. The adjustment of thecasing 86 will regulate the tension of the spring 90.

The workpiece 8| in the construction shown and as illustrated in part inFig. l2 of the drawings has a diamond 8m mounted therein. The workpiecebody is provided with beveled sockets or admission ports 8|b and 8|copening into the diamond. The diamond is drilled preferably by the useof three or more drills having different degrees of grindings on thepointed ends thereof. In Fig. 13 of the drawings, the drill 41a isground at substantially 45, the drill 41h at substantially 30, and thedrill 41e at substantially 15. It is the purpose to use these drills ina successive tension of the table 42, note Fig. 9 of the drawings. Theroller 94 operates upon a cam 96 to lower the workpiece 8| as well asthe bushing 84 against the action of the spring 68, an appreciabledistance away from the tool 41 in the grinding stage or position whichis later described. In this operation the screw 1| will move series ofoperations on one machine, or where several machines are employed, onedrilling may be performed on one machine, the other on the next, and thethird on the latter. If more stages of drillings are desired, otherbevels will be provided on the tools for producing the desired results.The present illustration is solely for the purpose. of giving an idea asto the procedure to be followed, and not to be regarded as a re-ystriction or limitation of the machine operation. The diamond may bepartially drilled on one side as indicated at 8|d, whereas the finaldrillings to produce the final restricted area 8|e may be performed inthe three stages as indicated and as diagrammatically shown in Fig. 12of the drawings.

Returning for a moment to the plunger 65, it will be seen upon aconsideration of Fig. 2 of the drawings that a rather heavy spring 85ais employed to seat upon the lower end of the plunger and upon an airvented bushing 84a supported within the bushing 64 so as to provide afurther yieldable backing for the plunger. The spring 65a also supportsthe plunger 85 in its upwardly extended position, and at the same timeholds the pin 83 firmly upon the surface of the wobble cam v84. In otherwords, the plunger is actuated by the cam through the compression of thespring 65a. The adjustment of the screw 1| will control the position oftheworkpiece with respect to the said unit.

away from the rod 12, and the bushing 64 is keyed against rotation bythe plate 93 operating in the slot 95. The cam 98 is xedly supportedupon the stationary table or bed 23 as seen at 96a in Fig. 1 of thedrawings.

It will be understood that throughout the operation of the machine, the`tables 42 and 45 are intermittently rotated to bring successive unitsconsisting of one workpiece and one drill, into what may be termed thegrinding and lubricating stage which is represented at :c in the uppercorner portion of Fig. 3 of the drawings. To provide this intermittentfeed of the tables, the periphery of the table 42 is provided with aseries of teeth or projections 42a, note Fig. 3 of the drawings, adaptedto be engaged by a pawl 91 pivoted to a ring 98. The ring 98 issupported upon the periphery of the table 42 and is intermittentlyrotated or oscillated circumferentially in a back and forth direction onthe periphery of the table 42 by a link 99 coupled with the disc 98 asseen at |00 and with a crank disc |0|. The latter is driven through areduction unit from -the pulley 26, the belt 26a of which passes arounda pulley 26h mounted on the shaft 28e of 'I'he unit is in the form of acasing |02 supported upon the column I6 or the extension |1 thereof aswill clearly appear in Fig. 3 of the drawings.

On the shaft 26e is a worm gear |03 operating a worm wheel |04 on ashaft |05. On the shaft |05 is a Worm |06 operating a gear |01 on theshaft |08 tov'which thecrank |0| is secured. It is preferred that a veryhigh reduction be provided so as to provide a slow intermittent feed ofthe respective units to successively bring them into the grinding stageposition as at It will be understood that as the disc 98 is rotated inone direction, the pawl 91 will. pick up one of the teeth 24a,'and inmoving the disc 98 in the opposite direction, the tables 42-45 will berotated one step. A spring 91a is employed to maintain the pawl inconstant engaging position.

Supported on the undersurface of the disc 98 is a` gear rack or-segment98a. This segment engages a gear |09 secured to a shaft ||0 supported ina suitable housing lil. The shaft H0 has another gear ||2 meshing with along rack bar ||3 slidably engaging the casing and controlling a pick-upand feed of a lubricant and abrasive such as diamond dust as applied toeach workpiece when the same is in the position Supported in conjunctionwith the housing is a long guide rail ||4 having intermediate its endsan upwardly and inwardly extending supporting arm H5 carrying at itsupper end a pan or a receptacle |I6 for the lubricant abrasive compound.Supported upon the guide rail ||4 is a slide I |1 on which is pivotallysupported as at H8 a pump cylinder H9. A pump'piston or plunger |20 iscoupled with an'operating lever |2| which is pivoted to the free end ofthe rack |18. The lever I 2| operates in a recessed portion of thecylinder block, said recessed portion having two adjustable screws |22and |23 to limit movement of the lever |2| in both directions.

Carried upon the outer end of the cylinder is a hook-shaped arm |24, thehook end |25 ofwhich is adapted to pass beneath the lower surface of therail to support the pump casing Il! in a position as indicated in Fig. 8of the drawings. The pump cylinder assumes a position at the extreme endof the guide rail ||4 substantially at the completion of theintermittent rotary movement of the tables 42 and 45. In this position,the pump cylinder is tilted in the psition shown in Fig. 7 to disposethe nozzle end |28 of a pick-up and delivery tube |21 within thereceptacle H8.

As the disc 98 is rotated through the crank employed, the rack ||'3 willbe nrst moved to the right asviewed in Fig. 7. actuating the pump |20 tosuck up a portion of compound from the receptacle. It will be understoodin this connection that the tube |21 is filled or substantially filledwith a lubricant or other fluid. When the lever |2| strikes theadjustable screw |23, the pump cylinder |29 will be tilted, thus raisingthe nozzle end |26 out of the receptacle and placing the hook end |25beneath the guide rail ||4. The slide ||1 is now moved to the right onthe slide 4 until it reaches the position indicated in Fig. 8. In thisposition, the nozzle end |25 is disposed directly above and centrallyofY the workpiece 8|, and the disc 98 has completed its rotaryoscillation in the non-feeding stroke.

Upon the beginning of the return or feed stroke of the disc or ring 98,the rack ||3 will rst move the lever |'2| in the direction of the screw|22, thus advancing the piston |20 in the cylinder to forcibly dischargethe drop or small portion of the lubricant abrasive compound into thebore of the diamond disposed within the workpiece 8|. As the movement ofthe ring 53 continues, the slide Il? is moved t0 the left and returns tothe position shown in Fig. '7, at the completion 'of which the pumpcylinder is tilted to re-submerge the nozzle |25 in the receptacle |'|5,and the above cycle of operation is repeated.

During the time of actuating the pick-up and delivery of the lubricantand abrasive compound, .which is performed while the tables 42-45 are atrest, each tool or drill 41 when in the position x and when theworkpieces 8| have been lowered through the means previously described,the ends of the drills or tools are ground automatically by a grindingwheel |28 which is mounted upon a rotatable and vertically oscillatingshaft |23 supported in a suitable housing |30. The housing |30 isadjustable upon a bracket plate |3| to vary the angularity orinclination of the grinding wheel with respect to the tool. to grind thevarious tapers on4 the pointed ends thereof, as indicated in Fig. 13 ofthe drawings. This adjustment may be gaged by a scale |3|a provided onthe surface of the plate |3| registering with a pointer I 32 supportedupon a fixed bracket member |33 secured to the column I6. The plate 3|is pivoted on the bracket |33 as seen at |33a, and held in diierentpositions of adjustment by a bolt |33b operating in an elongated slot|33c. This plate has a series of longitudinal dove-tailed grooves |34 inwhich headed bolts |35 are mounted, the latter being carried by thehousing The shaft |29 is driven from the pulley 28 and a belt 28apassing around a pulley |29a on said relatively high speed. At the sametime it is desirable to move the shaft longitudinally in its support.'I'his is accomplished by the rotation of an eccentric |38 supported inthe housing |33 and actuating a crankl |31 coupled with a lever |`38pivoted as seen at |33 to the housing and coupled With the shaft |29 asseen at |43. The eccentric is actuated from the pulley 21, the belt 21aand a pulley |4|, the latter mounted on a shaft |42 supported in thehousing |30.` On the shaft |42 is a worm |43 which meshes with a wormwheel |44 on the shaft of the eccentric |38. The reciprocating movementof the grinding wheel |23 over the-tool is relativelyvslow as `comparedwith the rotary movement imparted to said wheel.

The grinding wheel |28 is supported in a housing |45 having a suctionextension as at |43 whereby a suction pipe may be employed to draw thegrinding away from the machine as will be apparent.

The housing |45 has a bracket portion |41 keyed in the slots |34 of theplate |3| and held in different positions of adjustment by a bolt |43,note Fig. 4. Supported in an extension |45a of the housing |45 are twoadjustable screws |49 and |50, the screw |49 carrying on its inner end adiamond or other trimming tool |5| for re-surfacing the wheel |281 Onthe screw |43 is a gear |52 having spaced apertures |53 for a Spanner orother wrench, by means of which the gear |52 maybe rotated to feed thescrew |43 in advancing the tool |5| in the direction of the grindingwheel |23.

At |54 is a larger gear in operative engagement with the gear |52through an intermediate gear |55, so that the gear |54 is rotated attwice the speed of the gear |'52 to feed the screw y|53 a distance twicethat of the feed of the tool lll, so as to bring the housing |45 inproper position, compensating for the re-surfacing of the wheel |28. Inthis operation, the bolt |48 is loosened iiczsprovide the said movementof the housing It will of course be understood that the resurfacing ofthe grinding wheel |28 is performed only when occasions require thesame. Therefore, this operation is not automatic but is rather undermanual control.

In the above described operation with respect shaftso as to rotate thegrinding wheel |28 at 75 that all of the units are actuatedsimultaneously exceptfrom the standpoint of the feed of the workpiecestoward and from the drillwhich is controlled through the operation ofthe wobble cam which operates at relatively high speed. These units movearound and successively come into thel grinding stage or position as ata', and when in this position, the workpiece including its support ismoved downwardly through the action of the cam and supported in thisposition while the grinding wheel is operating upon the tool thensupported in this position. It will be understood that the tool isrevolved at the same speed as the grinding wheel is rotated over thesurface of the tool to re-grind or sharpen the same preparatory toanother cycle of operation, or in other words, until this tool againreturns to the grinding stage as at :v

The dropping of the lubricant and abrasive into the workpiece at thisparticular stage provides the necessary supply of lubricant and abrasiveto last until the workpiece again returnsI to the stage or position asat m.

After a series of these operations have been the drilling of diamonds inproducing what are known as drawing dies, that the machine is adaptablefor use in drilling any type and kind of workpieces where it isdesirable to maintain the drill in ilxed position while rotating at ahigh speed and in yieldably moving the workpiece to be drilled towardand from the drill. It will of course be apparent that the particularnumber of drill units employed on a machine may be varied and the degreeof automatic feed of the workpiece in the direction of the drills mayalso be varied in machines o! dlierent types land kinds, theillustration in the accompanying drawings being understood to representone adaptation of the invention.

In the operation of my improved machine it will be understood that oneof the distinctive characteristics of the machine resides in the factthat the tools 41 are mechanically and automatically moved in thedirection of the die or workpiece during each cycle of revolution of thetable 4l through the medium of the feed screw 55. By virtue of thisconstruction, and further by reason of the fact that the spacing of theworkpiece or die 5l with respect to the tool 41 is adjustable, it ispossible to so regulate the machine that the ilrst relative movement ofthe tool with respect to the workpiece may be so minute as to barelytouch the workpiece or in fact may not engage the workpiece, but in eachsuccessive position oi' i the tool and workpiece, as the table isrotated, the tool is brought in closer relationship to the workpiece inminute degrees. This construction and method of procedure eliminates thecollapsing of the pointed ends of the tool and eliminates the formationoi heads on these ends which commonly-occurs in other apparatus of thistype and kind by reason of an excessive blow between the tool and theworkpiece, the result of which is to llatten or head the pointed end ofthe tool, or in some cases to break 0E or' destroy this. pointed end. Inthe automatic operation oi the machine, it will also be apparent thatafter having completed one cycle oi operation, each tool is thenreground to sharpen the pointed end before starting the next cycle oioperation. 'I'his regrinding is consistent with and compensates for thedownward feed of the table and maintains a constant relationship of thetool with the workpiece as formed at any particular stage in the cycle,thus bringing the tools deeper and deeper into the workpiece or dieuntil the desired drilling operation has been performed. As previouslyset forth, this may be through a series of stages in forming thedifferent angles as diagrammatically illustrated in Fig. 12, it beingunderstood that the comparative relative degrees may be varied to suitdiierent types and kinds of workpieces. It-will also be apparent thatthe independent adjustability of each workpiece support and operatingmember provides for the independent control and regulation of eachworkpiece and the tool operating in conjunction therewith.

Having fully described my invention, what I claim as new and desire tosecure by Letters Patent, is:

l. A machine of the class described comprising a pair of intermittentlyrotatable members coupled together for simultaneous' movement, one

member supporting a` plurality of drill chucks with means adjustablysupporting drills therein, the other member having a plurality ofyyieldable workpiece supporting elements disposed vin vertical alinementwith said chucks, means aue tomatically rotating the drills at highspeed, means tor intermittently moving workpieces supported on saidelements toward and from said drills in the operation of drilling theworkpieces, means intermittently rotating 'said members step by step tobring. in one complete cycle of operation, all of the drills andworkpieces into one predetermined position, means at said predeterminedposition for moving each workpiece away from the companion drill. andmeans at said predetermined position for automatically grinding the endof a drill supported at said position to sharpen the same.

2. A machine of the class described comprising a pair oi intermittentlyrotatable members coupled together for simultaneous movement, one membersupporting a plurality of drill chucks with means adjustably supportingdrills therein, the other member having a plurality of yieldableworkpiece supporting elements disposed in vertical-alinement with saidchucks, means automatically rotating the drills at high speed, means forintermittently moving workpieces supported on said elements toward andfrom said drills in the operation of drilling the workpieces, meansintermittently rotating said members step by step to bring, in onecomplete cycle of operation, all of the drills and workpieces into onepredetermined position, means at said predetermined` position for movingeach workpiece away from the companion drill, means at saidpredetermined position for automatically grinding the end of a. drillsupported at said position to sharpen the same, and means automaticallydelivering a lubricant abrasive compound to the workpiece while in saidpredetermined position. i

3. A machine oi the class described comprising a pair of intermittentlyrotatable members coupled together for simultaneous movement, one membersupporting a plurality of drill chucks with means adjustably supportingdrills therein, the other member having a plurality of yieldableworkpiece supporting elements disposed in vertical alinement with saidchucks, means automatically rotating the drills at high speed, means forintermittently moving workpieces supported on said elements toward andfrom said drills in the operation of ldrilling the workpieces, meansintermittently rotating said members step by step to bring, in onecomplete cycle of operation, all of the drills and workpieces into onepredetermined position, means at said predetermined position for movingeach workpiece away from the companion drill, means at saidpredetermined position for automatically grinding the end of a drillsupported at said position to sharpen the same, means automaticallydelivering a lubricant abrasive compound to the workpiece while in saidpredetermined position, and means automaticallyv feeding one of saidmembers in the direction of the other member during successive cycles ofrotation of .both of said members to feed the drills a greater depthinto the workpieces.

4. `A machine oi' the class described comprising a pair ofintermittently rotatable members by step to bring, in one complete cycleof operation, all of the drills and workpieces into one predeterminedposition, means at said predetermined position for moving each`workpiece away from the companion drill, means at said predeterminedposition for automatically grinding the end of a drill supported at saidposition to sharpen the same, means automatically delivering a lubricantabrasive compound to the workpiece while in said predetermined position,means automatically feeding one of said members in the direction of theother member during successive cycles of rotation of both of saidmembersto feed the drills a greater depth into the workpieces, andadjustable means limiting the inward feed of the drills.

5. A machine of the class described comprising a pair of intermittentlyrotatable members coupled together ior simultaneous movement, one membersupporting a plurality of drill chucks with means adjustably supportingdrills therein, the other member having a plurality of yieldableworkpiece supporting elements disposed in vertical alinement with saidchucks, means automatically rotating the drills at high speed, means forintermittently moving workpieces supported on said elements toward andfrom said drills in the operation of drilling the workpieces, meansintermittently rotating said members step by step to bring, in onecomplete cycle of operation, all of the drills and workpieces into onepredetermined position, means at said predetermined position for movingeach workpiece away from the companion drill, means at saidpredetermined position for automatically grinding the end of a drillsupported at said position to sharpen the same, means automaticallydelivering a lubricant abrasive compound to the workpiece While in saidpredetermined position, means automatically feeding one ofsaid membersin the direction of theother member during successive cycles of rotationof both of4 said members to 'from the companion drill, means at saidpredetermined position for automatically grinding the end of a drillsupported at said position to sharpen the same, and means adjustablysupporting the last named means to vary the angularity of the grindingof said drills.

7. A machine of the class described comprising a pair oi intermittentlyrotatable members coupled together for simultaneous movement, one membersupporting a plurality of drill chucks with means adjustably supportingdrills therein, the other member having a plurality of yieldableworkpiece supporting elements disposed in vertical alinement with saidchucks, means automatically rotating the drills at high speed, means forintermittently moving workpieces supported on said elements toward andfrom said drills in the operation of drilling the workpieces, meansintermittently rotating said members step by step to bring, in onecomplete cycle of operation, all of the drills and workpieces into onepredetermined position, means at said predetermined position for movingeach workpiece away from the companion drill, means at saidpredetermined position for automatically grinding the end of a drillsupported at said position to sharpen the same, said last named meanscomprising a grinding wheel, and means for intermittently resurfacingsaid grinding wheel 8. A machine of the class described comprising apair of intermittently rotatable members coupled together forsimultaneous movement, one member supporting a plurality of drill chuckswith means adjustably supporting drills therein, the other member havinga plurality `of yieldable workpieces supporting elements disposed invertical alinement with said chucks, means automatically rotating thedrills at high speed, means for intermittently moving workpiecessupported on said elements toward and from said drills in the operationof drilling the workpieces, means intermittently rotating said membersstep Iby step to bring, in one complete cycle of operation, all of thedrillsand workpieces into one predetermined position, means at saidpredeter- V mined position for moving each workpiece away ing theangular position of the vsurface of the feed the drills a greater depthinto the workpieces, adjustable means limiting the inward feed of thedrills, and means for manually raising the drill chucks for thereplacement or re-setting of drills therein.

6. A machine of the class described comprising a pair of intermittentlyrotatable members coupled together for simultaneous movement, one membersupporting a plurality of drill chucks with means adjustably supportingdrills therein, the other member having a plurality of yieldableworkpiece supporting elements disposed in Vertical alinement with saidchucks, means automatically rotating the drills at high speed, means forintermittently moving workpieces supported on said elements toward andfrom said drills in the operation of drilling the workpieces, meansintermittently rotating said members step by step to bring, in onecomplete cycle of operation, all of the drills and workpieces into one`predetermined position, means at said predetermined position for movingeach workpiece away grinding wheel with respect to` the tool to beground.

9. In a drilling machine of the class described, a workpiece drillingmechanism comprising a drill supporting chuck, means for rotating saidchuck, a workpiece supporting unit `disposed in alinement with saidchuck, said unit comprising a bushing, a tubular plunger slidablymounted in the bushing, a workpiece supporting part yieldably supportedin said plunger, means limiting movement of said part in the directionof the drill chuck, and means moving said part intermittently toward andfrom the drill chuck.

10. In a drilling machine of the class described,

a workpiece drilling mechanism comprising a y workpiece arranged rangedin axial alinement drill chuck, means moving said part intermittentlytoward and from the drill chuck, and means yieldably supporting theplunger in said bushing.

11. In a. drilling machine of the class described, a workpiece drillingmechanism comprising a drill supporting chuck, means for rotating saidchuck, a workpiece supporting unit disposed in alinement with saidchuck, said unit comprising a bushing, a tubular plunger slidablymounted in the bushing, a workpiece supporting part yieldably supportedin-said plunger, means Hunting movement of said kpart in the directionof the drill chuck, means moving said part intermittently toward andfrom the drill chuck, means yieldably supporting the plunger in saidbushing, and means for moving the unit away from said chuck to space theworkpiece from a drill supported in said chuck.

12. In a drilling machine of the class described, a workpiece drillingdrill supporting chuck, means for rotating said chuck, a workpiecesupporting unit disposed in alinementwith said chuck, said unitcomprising a bushing, a tubular plunger slidably mounted in the bushing,a workpiece supporting part yieldably supported in said plunger, meanslimiting movement of said part in the direction of the drill chuck,means moving said part intermittently toward and from the drill chuck,means yieldably supporting the plunger in saidbushing, and meansautomatically feeding the chuck in the direction of said unit throughouta series of drilling operations.

13. The combination with a drilling machine having a drill supportingchuck with means for rotating the chuck and 'a drill supported thereinat high speed, of a workpiece supporting unit comprising a yieldablysupported plunger arranged in axial alinement with said drill chuck,means for intermittently moving the plunger toward and from the drillchuck, a workpiece supporting part having a yieldable mounting in saidplunger to provide yieldable engagement of a on said part with a drilldisposed in said chuck independent of the yielding support for saidplunger, and means adjustable on the plunger for varying the yieldingsupport for said part.

14. The combination with a drilling machine having a drill supportingchuck with means for rotating the chuck and a drill supported therein athigh speed, of a workpiece supporting unit comprising a yieldablysupported plunger arwith said drill chuck, means for intermittentlymoving the plunger toward and from the drill chuck, a workpiecesupporting part having a yieldable mounting in said plunger to provideyieldable engagement of a workpiece arranged on said part with a drilldisposed in said chuck independent of the yielding support for saidplunger, means adiustable on the plunger for varying the yieldingsupport for said part, and means for moving said plunger and part inwide spaced relationship away from a drill supported in said chuck.

15. A drilling machine of the class described comprising a verticalcolumn, a fixed bed plate disposed at one side of the column, meanssupporting a motor at the opposite side of the column with the shaft ofthe motor arranged parallel to the column, a spindle on said bed plate,two coupled discs rotatably mounted on the spindle, means intermittentlyrotating the discs step mechanism comprising a' by step to bringvertically alined drilling successively into predetermined position,each unit comprising a drill rotated at high speed and a yieldableworkpiece support yintermittently moved toward and from the drill in therotation thereof, means simultaneously rotating the drills of al1 ofsaid units, means for actuating the workpiece supports, and means forautomatically 'feeding the drills in the direction of the Workpiecesupports throughout a series of intermittent rotary movements of saiddiscs. i

16. A drilling machine of the class describedv comprising a verticalcolumn, a xed bed plate disposed at one side of the column, meanssupporting a motor at the opposite side of the column ,with the. shaftof the motor arranged parallel to the column, a spindle on said bedplate, two coupled discs rotatably mounted on the spindle, meansintermittently rotating the discs step by step to bring verticallyalined drilling units succcessively into predetermined position, eachunit comprising a drill rotated at high speed and a yieldable workpiecesupport intermittently moved toward and from the drill in the rotationthereof, means simultaneously rotating the drills of all of said units,means for actuating the workpiece supports, means for automaticallyfeeding the drills in the direction of the workpiece supports throughouta series of intermittent rotary movements of said discs, meansautomatically lowering the workpiece supports when in said predeterminedposition to give free access to the drill of said unit, a grinding wheelarranged in said predetermined position for engaging the drill, andmeans for rotating said wheel and for moving the same longitudinally ofthe pointed end of the drill in the operation of grinding the same.

17. A drilling machine' of the class described comprising a verticallcolumn, a nxed bed plate disposed at one side of the column, meanssupporting a motor at the opposite side of the col-- umn with the shaftof the motor arranged parallel to the column. a spindle on said bedplate, two coupled discs rotatably mounted on the spindle, meansintermittently rotating the discs step by step to bring verticallyalined drilling, units successively into predetermined position, eachunit comprising a drill rotated at high speed and a yieldable workpiecesupport intermittently moved toward and from the drill in the rotationthereof, means simultaneously rotating the drills of all of said units,means for actuating the workpiece support, means for automaticallyfeeding the drills in the direction of the workpiece supports throughouta series 'of intermittent rotary movements of said discs, meansautomatically lowering the workpiece supports when in said predeterminedposition to 'give free access to the drill of said unit, a grindingwheel arranged in said predetermined position for engaging the drill,means for rotating said wheel and for moving the same longitudinally ofthe pointed end of the drill in the operation of grinding the same, andmeans adjusting the angular position of said grinding wheel to regulatethe angularity or taper of the pointed end of said drill.

18. A drilling machine of the class described comprising a verticalcolumn, a xed bed plate disposed at one side of the column, meanssupporting a motor at the opposite side of the column With the shaft ofthe motor arranged parallel to the column, a spindle on said bed plate,l

two coupled discs rotatably mounted on the spindle, means intermittentlyrotating the discs step by step to bring vertically alined drillingunits successively into predetermined position, each unit comprising adrill rotated at high speed and a yieldable workpiece supportintermittently moved toward and from the drill in the rotation thereof,means simultaneously rotating the drills of all ofsaid units, means foractuating the workpiece supports, means for automatically feedingthedrills in the direction of the workpiece supports throughout a seriesof intermittent rotary movements of said discs, means automatically 10lowering the workpiece supports when in said predetermined position tovgive free access to the drill of said unit, a grinding wheel arrangedin said predetermined position for engaging the drill, means forrotating said wheel and for moving the same longitudinally of thepointed end of the drill in the operation of grinding the same, meansadjusting the angular position of said grinding wheel to regulate theAangularity or taper of the pointed end of said drill, means involvingspaced drives longitudinally of the motor shaft for rotat ing thedrills, operating the workpiece support.

intermittently rotating said discs, rotating the' grinding wheel and formoving said wheel longirotating said drill chucks and workpiecesupporting members in a successive series of intermittent movements ineach complete cycle of rotation of said chucks and members with respectto a predetermined position, means for slowly feeding the drill chucksin the direction of said members in the intermittent rotary movementimparted thereto to slowly feed the drills into workpieces supported insaid members, and means for rotating drills supported in said chucks athigh speed.

AARON SIMONS.

